[First Look] DFI 680i LT NF-680i LT SLI (56K Warning~~~)

[century child]

[QUOTE=hmm... i dont even want to feed my ram's with 3,04v for seconds [/QUOTE]

As I understand it, this only happened when loading a saved BIOS profile, not at every BIOS clear.

[denden]

Hi everyone I just got one dfi 680i, priming my e4300 at 3150mh@1.4vcore(bios)1.36vcore(actual) . found 2 main problem 1) quite a serious vdrop in vdimmn, nb and core even though I using the updated bios. 2)have to clear cmos whenever oc failed to boot . Any guide here to get away from the desparated on & off and any way to fix the vdrop?

[virtualrain]

Hi everyone I just got one dfi 680i, priming my e4300 at 3150mh@1.4vcore(bios)1.36vcore(actual) . found 2 main problem 1) quite a serious vdrop in vdimmn, nb and core even though I using the updated bios. 2)have to clear cmos whenever oc failed to boot . Any guide here to get away from the desparated on & off and any way to fix the vdrop?

There is definitely an undervolt between what you set and what you get in BIOS for CPU VID and NB Voltage... just dial in some extra to compensate. There's more info on my blog (via the link in my sig). VDIMM is similar but not as bad... what exactly is the gap you are observing?

The actual droop under load of these values is not bad. CPU droop is much better than most and NB and VDIMM is insignificant.

When you can't boot due to your OC, use the power/reset button trick as described in the manual to quickly clear CMOS. Keep your baseline settings in a "CMOS Reloaded" profile and you can quickly get back to where you were in no time.

[denden]

There is definitely a gap between what you set and what you get in BIOS for CPU VID and NB Voltage... just dial in some extra to compensate. There's more info on my blog (via the link in my sig). VDIMM is similar but not as bad... what exactly is the gap you are observing?

The actual droop under load of these values is not bad. CPU droop is much better than most and NB and VDIMM is insignificant. cpu around 0.04v, NB around 0.2V

When you can't boot due to your OC, use the power/reset button trick as described in the manual to quickly clear CMOS. Keep your baseline settings in a "CMOS Reloaded" profile and you can quickly get back to where you were in no time.

yeah I know to restore the last bootable setting but only feed up with moving the jumper, I will get bk on the manual on the power/reset button, thks a lot

[virtualrain]

yeah I know to restore the last bootable setting but only feed up with moving the jumper, I will get bk on the manual on the power/reset button, thks a lot

That power/reset button trick is a life saver for sure.

As for the voltages, I think you mean there is a significant undervolt on the CPU/NB... and while there is a bit of droop (as expected on the CPU) there is no droop on the NB right?

Undervolt = gap between what is set in BIOS and what you get
droop = difference between idle and load voltage

[denden]

That power/reset button trick is a life saver for sure.

As for the voltages, I think you mean there is a significant undervolt on the CPU/NB... and while there is a bit of droop (as expected on the CPU) there is no droop on the NB right?

Undervolt = gap between what is set in BIOS and what you get
droop = difference between idle and load voltage

oh...I not reliased the difference of load and idle voltage and will check it tonight, but there is definiately an undervolt, does it matter?

[Jobeo]

well i got somewhere... installed 3dmark03 and loaded my sketchy settings... the reboot crash occured during the benchmark, which actually made me happy cause now i had a better way of testing it.

i tweaked the NB volts higher that didn't help. even tried running the test non-SLI and it seemed to reboot even faster. all of the reboots were occuring at different times during the test there seemed to be no pattern.

so i started fiddling with the GTL's ... i had them set at the "sweet spot" of 1.44v and 170 95 85... tried them a bit higher and the test seemed to run a bit longer before rebooting. finally ended up with GTL's of 180 100 90 and 3dmark03 passed for the first time ! ! i ran the test 3 more times and it passed each time. then ran the 3dmark05 and 3dmark06 tests and both passed. loaded an old supcom save with a lot of units and that seemed to go OK too...

SO.... to make a long story short... i mean, i knew the GTL's were important cause i've mentioned them in almost every post these past couple days.. but MAN they are _really_ important. unless i'm mistaken we're talking about tweaking millivolt settings yet it seems to have a huge impact on stability.

so i think i've found a new sweet spot at 1.44 and 180 100 90. which doesn't really add up cause the Nvidia GTL reference table says the VTT should be 1.55 at those GTL's but whatever works i'll take it... i'll probably need to test further with another prime blending session but for now things are looking good.